| Patent Number |
Title Of Patent |
Date Issued |
| 6274756 |
Esters, ethers, and compositions comprising them |
August 14, 2001 |
| Esters and ethers of 2,4,6-trimethylnonanol, compositions comprising them, their uses, and processes for their manufacture. |
| 6177373 |
Procedure for preparing molecular sieve films |
January 23, 2001 |
| The invention is comprised of a procedure for applying molecular sieve films to the surface of different substrates. This procedure is characterized in that microcrystals of the molecular sieves in question bind to the substrate surface in a first step as a monolayer, and are then, i |
| 6023005 |
Process for converting oxygenates to olefins using molecular sieve catalysts comprising desirabl |
February 8, 2000 |
| The present invention relates to methods for selectively converting oxygenates to light olefins, preferably ethylene and propylene, in which desirable carbonaceous deposits are maintained on a total reaction volume of catalyst by totally regenerating only a portion of the total reaction |
| 6005155 |
Modification of molecular sieve catalyst for reduced methane production during conversion of oxy |
December 21, 1999 |
| A method for modifying a molecular sieve catalyst to reduce methane production during conversion of oxygenates to olefins. The molecular sieve catalyst comprises a separately synthesized framework comprising a material selected from the group consisting of silica, alumina, phosphate, |
| 5998683 |
Process for forming cyclopentane from dicyclopentadiene |
December 7, 1999 |
| A method for producing a cyclopentane product which comprises the following steps: (a) cracking dicyclopentadiene to form a cyclopentadiene-rich stream and a higher boiling liquids stream; (b) separating the cyclopentadiene-rich stream from the higher boiling liquids stream; (c) dilu |
| 5635437 |
Method for preparing metallocene catalyst systems |
June 3, 1997 |
| This invention is generally directed toward a method for producing metallocene catalyst systems. Specifically, the method involves removing solid impurities from a solution of activated metallocene wherein activation has the effect of solubilizing the metallocene but not the impuriti |
| 5621044 |
Intervulcanized elastomer blends |
April 15, 1997 |
| Intervulcanized compositions having improved curing efficiency are prepared by the free radical curing of a mixture of an ethylenically unsaturated diolefin polymer such as natural or synthetic rubber and a saturated or low unsaturation polymer such as an ethylene propylene elastomers |
| 5152884 |
Zeolites for reforming catalysts |
October 6, 1992 |
| Zeolites washed with aqueous solutions or water to exhibit pH in the range of 9.4 to 10.0 and preferably 9.6 to 10.0 which can be converted to reforming catalysts with enhanced activity, selectivity and activity maintenance. Also processes for washing the zeolite to the target pH range |
| 5146009 |
Process for the recovery of alcohols using an organic acid-modified polymer membrane |
September 8, 1992 |
| According to the process of this invention, alcohols are recovered from aqueous acid solution by permeation of the alcohol through an organic-acid modified polymer membrane. An improved process for the manufacture of alcohols by acid absorption of olefins is also disclosed, the improveme |
| 4964466 |
Hydraulic fracturing with chlorine dioxide cleanup |
October 23, 1990 |
| A method of fracturing a subterranean formation involving the use of crosslinked gels to form a fracture and deposit particulate proppant therein followed by the introduction of dilute aqueous solutions of chlorine dioxide in the propped fracture to degrade the gel. |
| 4871022 |
Method for removing polymer plugging in well boreholes |
October 3, 1989 |
| A method of removing polymeric material from injection and producing wells in which an aqueous medium containing, chlorine dioxide or sodium chlorite is introduced into the well and maintained in contact with the polymeric material for a period of time sufficient to degrade the polymeric |
| 4853337 |
Blending of hydrocarbon liquids |
August 1, 1989 |
| Crude oil (one of which is a high fouling crude oil) are blended to maintain the incompatible asphaltene thereof below a predetermined level thereby reducing the fouling tendency of the high fouling crude oil. Paraffinic liquids, LPG's, and condensates may also be blended with crude |
| 4781893 |
Apparatus for determining fouling tendency of liquid hydrocarbons using polar polymeric membrane |
November 1, 1988 |
| Apparatus and method for determining the tendency of hydrocarbon liquid to foul equipment includes a horizontal polymeric membrane made from polymers containing polar atoms, a light source for scanning hydrocarbon liquid sample on the membrane, and means for measuring the difference in l |
| 4781892 |
Apparatus and method for determining fouling tendency of liquid hydrocarbons |
November 1, 1988 |
| Apparatus and method for determining the tendency of hydrocarbon liquid to foul equipment includes a horizontal TLC plate, a light source for scanning hydrocarbon liquid sample on the TLC plate, and means for measuring the difference in light reflected by the asphaltene ring and the |
